Suburb profile · ABS Census 2021
Birnam suburb profile
Birnam, QLD · Postcode 4285
This Birnam suburb profile summarises official Australian Bureau of Statistics Census 2021 data for Birnam, QLD (postcode 4285). Use it as a free suburb report covering population, median rent, household income, age, housing tenure and employment, plus how those figures changed since Census 2016— then compare Birnam with nearby suburbs.
Birnam at a glance
Population
109
Median rent
$490/wk
Household income
$2,107/wk
Median age
44
Birnam trends (2016 → 2021)
Change since the previous Census. Historical figures are mapped from State Suburbs (SSC) to today's suburb boundaries.
Population
Census 2011 → 2016 → 2021
-1.8% over 10 years
Population
109
was 106 in 2016
+3 · +2.8%
Median rent
$490/wk
was $460/wk in 2016
+$30 · +6.5%
Household income
$2,107/wk
was $1,899/wk in 2016
+$208 · +11%
Median age
44
was 45 in 2016
-1 · -2.2%
Dig deeper: Birnam population growth · Birnam then and now
Birnam vs nearby & Greater Brisbane
Median Census 2021 figures for Birnam, nearby suburbs (8), and the Brisbane metro median (suburbs with 1,000+ people).
Rent
+16.7% vs area
- Birnam$490/wk
- Nearby$385/wk
- Brisbane$420/wk
Household income
+4.6% vs area
- Birnam$2,107/wk
- Nearby$2,143.5/wk
- Brisbane$2,015/wk
Median age
+18.9% vs area
- Birnam44
- Nearby38
- Brisbane37
Personal income
-2.4% vs area
- Birnam$844/wk
- Nearby$783.5/wk
- Brisbane$865/wk
Nearby uses the same postcode first, then larger suburbs in QLD. See Brisbane rankings.
Socio-economic profile
How Birnam compares to other Australian suburbs on income, education and occupation — from official ABS SEIFA 2021 data.
Birnam sits around the national middle for socio-economic advantage.
Relative disadvantage (IRSD)
Decile 61,023.3
Lower score / decile = more relative disadvantage
Advantage & disadvantage (IRSAD)
Decile 6987.7
Higher score / decile = more relative advantage
Economic resources (IER)
Decile 71,049.6
Access to economic resources (income, housing)
Education & occupation (IEO)
Decile 5967.9
Education and occupational skill levels
Source: ABS SEIFA 2021. See methodology.
Birnam on the map
OpenStreetMap outline for Birnam, QLD.
Map data © OpenStreetMap contributors. Boundary matching is approximate.
Birnam people
- Population
- 109
- Median age
- 44
- Born overseas
- 16.5%
- Average household size
- 2.9
Total usual residents (Census 2021)
Median age of residents in years
Percentage born outside Australia
Average number of people per household
Birnam income
- Median household income
- $2,107/wk
- Median personal income
- $844/wk
Median total weekly household income
Median total weekly personal income
Birnam housing
- Median rent
- $490/wk
- Median mortgage repayment
- $2,134/mo
- Separate houses
- 94.4%
- Flats & apartments
- 0%
- Owned outright
- 38.9%
- Mortgaged
- 44.4%
- Rented
- 22.2%
- Unoccupied dwellings
- 0%
Median weekly rent for rented dwellings
Median monthly mortgage repayment
Percentage of dwellings that are separate houses
Percentage of dwellings that are flats or apartments
Percentage of dwellings owned without a mortgage
Percentage of dwellings with a mortgage
Percentage of dwellings rented
Percentage of private dwellings unoccupied on Census night
Birnam work
- Employment to population
- 61.8%
- Unemployment rate
- 10.3%
- Year 12 or above
- 41.2%
Employed persons as a percentage of population aged 15+
Unemployed persons as a percentage of the labour force
Percentage with Year 12 or equivalent as highest school level
Nearby suburb profiles (near 4285)
Compare Birnam with nearby suburbs
Birnam in numbers
Birnam had 109 residents at the 2021 Census. The median age is 44, 10% above the typical QLD suburb. The average household has 2.9 people. 16.5% of residents were born overseas.
Among occupied homes, 38.9% own their home outright, 44.4% are paying a mortgage, 22.2% rent. Separate houses make up 94.4% of dwellings, with 0% in flats or apartments. Median rent was $490/wk, 40% above the typical QLD suburb.
Median household income was $2,107/wk, 25% above the typical QLD suburb. On the ABS SEIFA index of relative socio-economic disadvantage it sits in decile 6 nationally (1 is most disadvantaged, 10 least).
Between the 2016 and 2021 Censuses the population grew 2.8% (from 106 to 109). Median rent moved from $460/wk to $490/wk (+6.5%).
Birnam suburb FAQs
- What is the median rent in Birnam, QLD?
- The median weekly rent in Birnam was $490/wk at the 2021 Census (ABS).
- How many people live in Birnam, QLD?
- Birnam had 109 residents at the 2021 Census, up 2.8% from 2016.
- What is the median household income in Birnam?
- Median household income in Birnam was $2,107/wk at the 2021 Census.
- Do most people rent or own in Birnam?
- 22.2% of occupied homes in Birnam were rented, 38.9% were owned outright and 44.4% were owned with a mortgage.
About this Birnam suburb profile
Figures are from the ABS Census of Population and Housing 2021 (General Community Profile) for the Suburbs and Localities boundary matching Birnam (Scenic Rim - Qld). Where shown, 2016 values come from the 2016 State Suburbs (SSC) profile, linked via ABS geographic correspondence — boundaries are not always identical. Medians may be suppressed for very small areas. This is not financial or relocation advice — use it alongside current market data.
Source: ABS Census 2021. Methodology · Richest suburbs in Brisbane